41.
									
										Objection as to non-joinder or mis-joinder of parties under order 1, Rules 13 of CPC
									
								
															
														
																									
										A:
											 Can be taken at any stage of the proceedings 
									
																										
										B:
											should be taken at the earliest possible opportunity or shall be invalid
									
																										
										C:
											 can be taken in appeal or revision for the first time
									
																										
										D:
											 either a or c 
									
																								 
							
																
									The answer is:
										B